Huh... You just want to believe that Dylan will have an event on PD 16. Fine believe in it.
Ellie has only 1 event on PD 14. The first event is mentioned as Very short. Which means hardly 20-30 renders i believe. The only legit Ellie scene is 1 immediately after the very short Sam scene.
Dylan's last big event was on Day 17, now it is on Day 20 and 21 both with multiple events.
Ellie is first but very close are Julia and Nathalie. Some might even say the opposite since Julia had a steamy sensory deprivation scene and ice play. Not to much the makeout with the fondling. Nathalie saw Sophia's butthole which no one in the game has and groped her all over.
On the male route. Except for kissing Aiden has done a lot more than Sam. If anything Sam has yet to see Sophia's breast which All Dylan, Zac and Aiden, even Larry Deshawn etc have seen. Sophia has seen all 3 boys i mentioned above naked and liked their dicks except Sam till now.
Plus Sam finally got his big scene on PD 12 after a huge amount of build up. Seriously what even happened in that route until the Jaccuzi event. Just an areola show. Dylan has had much more action with the Shopping scene, Beach scene and the Bikini Show is primarily Dylan's event.
So in short Every character gets to shine and take the lead at some point in the story. Right now Aiden and Sam are ahead. Maybe after PD 14 Dylan will be leading. Ellie is leading now but after PD 15 with Patricia's big event, that might also change. Nothing big has happened on Patricia's route either except for the kiss. But PD 15 even contains the first lesbian sex scene. So the prospects do look good for Patricia taking over.
To conclude, i would suggest for us to never see this as a competition on which character is ahead and who did what with Sophia. All routes are always nearby. And in the end all the important characters will go equally far with Sophia which is basically supposed to be sex.